| 摘要 |
There is disclosed a laser beam delivery apparatus comprising a laser (10) having an axis (14), a first mirror (13) at one end of the laser (10) and adapted to reflect the beam normal to the laser axis (14), a second mirror (15) aligned with the first mirror (13), the second mirror (15) adapted to reflect the beam along a further axis (16), a telescopic means (30) joining the first and second mirrors (13, 15), a third mirror (19) aligned with the second mirror (15) and a focusing means (33) associated with the third mirror (19) for focusing the beam on a workpiece. Also disclosed is a sensing means (63) for sensing the distance of a focusing head (33) of a laser delivery system above a workpiece to be subjected to the action of the laser beam. |
